A matched-mode processing technique for localizing a transient source in the time domain

I-Tai Lu, H. Y. Chen, Peter Voltz

Research output: Contribution to journalArticle

Abstract

A matched-mode processing method separates the range and depth estimation tasks, thereby obtaining a sequential procedure that circumvents the need for a two-dimensional search over all hypothesized source locations. Therefore, when applicable, it is more efficient than a matched-field method. Here, the conventional frequency-domain, matched-mode method is extended to deal with more realistic nonharmonic, narrow-band signals directly in the time domain. The modes are separated by the conventional modal filtering approach. Then, the source range and depth information can be estimated by the relative arrival times and energies of a relatively well-behaved subset of the modal arrivals. In this way, the problem of modal phase ambiguity is removed, and the entire frequency content of the modal arrivals is coherently combined by operating directly on the time waveforms. Moreover, this approach does not require a prior knowledge of the source waveform. In the numerical simulation, the source and receiver arrangement and the ocean parameters are taken from an experimental setup in the Mediterranean Sea [S. M. Jesus, J. Acoust. Soc. Am. 90, 2034-2041 (1991)].

Original languageEnglish (US)
Pages (from-to)1365-1373
Number of pages9
JournalJournal of the Acoustical Society of America
Volume93
Issue number3
StatePublished - 1993

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arrivals
field method
arrival time
waveforms
Mediterranean Sea
ocean
ambiguity
set theory
simulation
energy
narrowband
oceans
receivers
method
need
parameter
Conventional
Field Methods
Energy
Ocean

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)
  • Acoustics and Ultrasonics

Cite this

A matched-mode processing technique for localizing a transient source in the time domain. / Lu, I-Tai; Chen, H. Y.; Voltz, Peter.

In: Journal of the Acoustical Society of America, Vol. 93, No. 3, 1993, p. 1365-1373.

Research output: Contribution to journalArticle

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